package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    public void saveWithFlavor(DishDTO dishDTO) {
    Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //想菜品表插入1条数据
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId=dish.getId();
        //向口味表插入n条数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null&& flavors.size()>0){
           flavors.forEach(flavor->{
               flavor.setDishId(dishId);
           });
           dishFlavorMapper.insertBatch(flavors);
        }


    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishDTO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    @Override
    public void deleteBach(List<Long> ids) {
//判断是否菜品存在，起售或者停售
for(Long id : ids){
    Dish dish=dishMapper.getById(id);
    if(dish.getStatus()== StatusConstant.ENABLE){
        throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
    }
}
//判断菜品能否删除，是否关联
List<Long> setmealIds=setmealDishMapper.getSetmealIdsByDishIds(ids);
if(setmealIds!=null&&setmealIds.size()>0){
    throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
}
//删除菜品表中的菜品数据
        for(Long id : ids){
            dishMapper.deleteById(id);
        }

//删除关联的口味
        for (Long id:ids){
            dishMapper.deleteFlavorById(id);
        }

    }

    @Override
    public DishVO getDishByIdWithFlavor(Long id) {
        //获取菜品
        Dish dish=dishMapper.getById(id);
        //获取口味
        List<DishFlavor> flavor=dishFlavorMapper.getByIdWithFlavor(id);
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(flavor);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        //删除口味信息
        dishMapper.deleteFlavorById(dish.getId());

        //逐行插入口味
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
            flavors.forEach(flavor->{
                flavor.setDishId(dish.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public List<Dish> getCategoryById(Long categoryId) {
        Dish dish=Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }
//一个套餐ID可能有多个菜品
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList=dishMapper.list(dish);
       List<DishVO> dishVOList=new ArrayList<>();
       dishList.forEach(d->{
           DishVO dishVO=new DishVO();
           BeanUtils.copyProperties(d,dishVO);
           List<DishFlavor> dishFlavorList=dishFlavorMapper.getByIdWithFlavor(d.getId());
           dishVO.setFlavors(dishFlavorList);
           dishVOList.add(dishVO);
       });
       return dishVOList;
    }


}
